化工離心泵與自吸泵的功能介紹對(duì)比?。。?/title>
<div align="center"><span style="font-size:14px">作者： 來(lái)源： 發(fā)布時(shí)間：2018-08-15</span></div>
<p><br/></p><p style="line-height: 2em;"><span style="font-size: 16px;">離心泵和自吸泵的區(qū)別主要是：自吸泵安裝前灌滿泵腔后就能把水吸上來(lái)，以后不需要再加引水,泵體比離心泵大很多自身帶有儲(chǔ)水功能，具有一次引水終身自吸的功能，而離心泵是起到增壓的作用，液位必須比泵高要能流到泵體里面來(lái)才能啟動(dòng)，如果液位比離心泵低只能在進(jìn)口管道吸入口安裝底閥把泵和管道里面灌滿液體才能達(dá)到自吸輸送功能，或者在進(jìn)口安裝虹吸筒。</span></p><p style="line-height: 2em;"><span style="font-size: 16px;"> 自吸泵均采用軸向回液的泵體結(jié)構(gòu)。離心泵體由吸入室、儲(chǔ)液室、渦卷室、回液孔、氣液分離室等組成，離心泵正常啟動(dòng)后，葉輪將吸入室所存的液體及 吸入管內(nèi)中的空氣一起吸入，并在葉輪內(nèi)得以完全混合，在離心力的作用下，液體夾帶這氣體向渦卷室外緣流動(dòng)，在葉輪的外緣上形成一定厚度的白色泡沫帶及高速 旋轉(zhuǎn)液環(huán)。氣液混合體通過(guò)擴(kuò)散管進(jìn)入氣體分離室。此時(shí)，由于流速突然降低，較輕的氣體從混合液體中被分離出來(lái)，氣體通過(guò)泵體吐出口繼續(xù)上升排出。脫氣后的 液體回到儲(chǔ)液室，并由回流孔再次進(jìn)入葉輪，與葉輪內(nèi)部從吸入管道中吸入的氣體再次混合，在高速旋轉(zhuǎn)的葉輪作用下，又流向葉輪外緣。</span></p><p style="line-height: 2em;"><span style="font-size: 16px;"> 離心泵一般由電動(dòng)機(jī)帶動(dòng)，在啟動(dòng)泵前，泵體及吸入管路內(nèi)充滿液體。當(dāng)液體進(jìn)入泵殼后，由于蝸殼形泵殼中的流道逐漸擴(kuò)大，液體流速逐漸降低，一部分動(dòng)能轉(zhuǎn)變?yōu)殪o壓能，于是液體以較高的壓強(qiáng)沿排出口流出。與此同時(shí)，葉輪中心處由于液體被甩出而形成一定的真空，而液面處的壓強(qiáng)Pa比葉輪中心處要高，當(dāng)葉輪高速旋轉(zhuǎn)時(shí)，葉輪帶動(dòng)葉片間的液體一道旋轉(zhuǎn)，由于離心力的作用，液體從 葉輪中心被甩向葉輪外緣(流速可增大至15～25m/s)，動(dòng)能也隨之增加。</span></p><p><br/></p><p><br/></p> </div>
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